diff --git a/lldb/tools/driver/Options.td b/lldb/tools/driver/Options.td
--- a/lldb/tools/driver/Options.td
+++ b/lldb/tools/driver/Options.td
@@ -159,6 +159,10 @@
   Alias<one_line>,
   HelpText<"Alias for --one-line">,
   Group<grp_command>;
+def: Separate<["-"], "ex">,
+  Alias<one_line>,
+  HelpText<"Alias for --one-line.">,
+  Group<grp_command>;
 
 def one_line_before_file: Separate<["--", "-"], "one-line-before-file">,
   MetaVarName<"<command>">,